It jumped the shark probably about two seasons ago. After the stupid cliffhanger that lasted the entire offseason, over who Negan killed in the season 6 finale. And then it really started to decay with the dragging ass season 7, with so many filler and bottled episodes. I did think season 8 was good, don't get me wrong, but killing Carl off Carl was a pretty bad move, as much as I didn't really care much for the character one way or the other. And now do you see who's getting killed off in a few episodes? It's not even a spoiler anymore, because after it leaked and AMC couldn't ignore it anymore, they started promoting it as his final episodes.
I still watch it, because I'm invested in it, but I did give up on Fear The Walking Dead, which I actually liked the first 3 seasons of. After they killed off almost all of the original characters and made it Morgan's show, they lost me. I watched all of the episodes from the first half, but didn't watch any in the second half until the season finale. It's not Morgan's fault that they killed off the important original characters. I would have been fine with Morgan on there along with them, but they felt the need to kill the two biggest (and original characters) characters after he came along.
Anyway, probably better suited for the entertainment thread.